Year	Percent
1950	14.11805
1955	16.81967
1960	16.85824
1965	16.49213
1970	16.59041
1975	16.18021
1980	15.58288
1985	14.88718
1990	13.03218
1995	11.61359
2000	11.29482
2005	11.31268
2010	10.12744
2015	8.9576
2020	8.44768
2025	8.11623
2030	7.80527
2035	7.41187
2040	6.99239
2045	6.60704
2050	6.3492
2055	6.2171
2060	6.13742
2065	6.05201
2070	5.94516
2075	5.84946
2080	5.78699
2085	5.77301
2090	5.77824
2095	5.77458
2100	5.74225